ARVE Error: id and provider shortcodes attributes are mandatory for old shortcodes. It is recommended to switch to new shortcodes that need only url
In a post earlier today we told you about a $6.6 million federal grant to help fund Metrolink’s efforts to install Positive Train Control (PTC) along its commuter rail system.
But what is PTC exactly? This informative video from Metrolink features some nice computer animation that explains how system works.
In a nutshell: a network of computers and GPS technology connect trains, signals and central offices to ensure the safest possible operation of trains.